<template>
  <div>
    <!-- 面包屑到导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条区域 -->
      <el-steps :active="activeIndex - 0" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
      </el-steps>
      <el-form
        :model="addGoodsForm"
        :rules="addFormrules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="tabPosition"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="handleTabClick"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addGoodsForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input
                v-model="addGoodsForm.goods_price"
                type="number"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input
                v-model="addGoodsForm.goods_weight"
                type="number"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input
                v-model="addGoodsForm.goods_number"
                type="number"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat" type="number">
              <el-cascader
                v-model="addGoodsForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
                clearable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示图片上传的的地址  preview预览事件 remove移除图片 list-type图片预览的呈现方式-->
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObject"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addGoodsForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="addBtn" @click="addGoodsLast">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
      <!-- tab栏区域 -->
    </el-card>
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="50%"
    >
      <img :src="previewPath" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      // 图片预览的url地址
      previewPath: '',
      // 商品分类列表
      cateList: [],
      // 动态参数数组
      manyTableData: [],
      // 静态属性列表
      onlyTableData: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children',
      },
      previewDialogVisible: false,
      // 图片上传组件的请求头
      headerObject: {
        Authorization: window.sessionStorage.getItem('token'),
      },
      activeIndex: 0,
      tabPosition: 'left',
      // 添加商品的表单对象
      addGoodsForm: {
        goods_name: '',
        goods_price: null,
        goods_weight: null,
        goods_number: null,
        goods_cat: [],
        // 上传图片的数组
        pics: [],
        // 商品的相信介绍
        goods_introduce: '',
        attrs: []
      },
      addFormrules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入活动名称', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' },
        ],
      },
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {})
      if (res.meta.status !== 200) {
        this.$message.error('获取数据失败:' + res.meta.msg)
      }
      this.cateList = res.data
    },
    // 级联选择器选择项的变换监听
    handleChange() {
      if (this.addGoodsForm.goods_cat.length !== 3) {
        this.addGoodsForm.goods_cat = []
      }
    },
    beforeTabLeave(activeNmae, oldActiveName) {
      if (oldActiveName === '0' && this.addGoodsForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async handleTabClick() {
      // 证明访问的是参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'many',
            },
          }
        )
        if (res.meta.status !== 200) {
          this.$message.error('获取数据失败:' + res.meta.msg)
        }
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'only',
            },
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取数据失败:' + res.meta.msg)
        }
        this.onlyTableData = res.data
      }
    },
    // 预览图片
    handlePreview(file) {
      this.previewPath = file.response.data.url
      this.previewDialogVisible = true
    },
    // 移除图片
    handleRemove(file) {
      /**
       * 1：获取删除的图片临时路径
       * 2：从pics中找到要删除图片的索引值
       * 3：调用数组的split方法把图片信息从picts中移除
       */
      const filePath = file.response.data.tmp_path
      const i = this.addGoodsForm.pics.findIndex((x) => x.pic === filePath)
      this.addGoodsForm.pics.splice(i, 1)
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      /**
       * 1：拼接得到图片信息
       * 2：将信息储存到pics中
       */
      const picInfo = { pic: response.data.tmp_path }
      this.addGoodsForm.pics.push(picInfo)
    },
    // 添加所有的属性给商品
    addGoodsLast () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('填写完整的表单项')
        }
        // 执行合法操作
        // 改造表单数据 对数据goods_cat进行深拷贝 借助lodsh 方法 cloneDeep方法
        const form = _.cloneDeep(this.addGoodsForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数与静态属性
        this.manyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
          this.addGoodsForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addGoodsForm.attrs.push(newInfo)
        })
        form.attrs = this.addGoodsForm.attrs
        // 发起请求
        console.log(form)
        const { data: res } = await this.$http.post('goods', form)
        console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败:' + res.meta.msg)
        }
      })
    }
  },
  computed: {
    cateId() {
      if (this.addGoodsForm.goods_cat.length === 3) {
        return this.addGoodsForm.goods_cat[2]
      }
      return null
    },
  },
}
</script>
<style lang="less" scoped>
.el-cascader {
  width: 200px;
}
.el-checkbox {
  margin: 0 5px 0 0 !important;
}.previewImg {
  width: 100%;
}
.addBtn {
  margin-top: 15px;
}
</style>
